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First data on parasites of the invasive brown bullhead Ameiurus nebulosus (Siluriformes: Ictaluridae) in Ukraine

M. Yu. Tkachenko
M. Yu. Tkachenko
, 
I. Dudliv
I. Dudliv
, 
Y. Kvach
Y. Kvach
, 
I. Dykyi
I. Dykyi
, 
K. Nazaruk
K. Nazaruk
 et 
M. Ondračková
M. Ondračková
   | 31 déc. 2023
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Publié en ligne: 31 déc. 2023
Pages: 357 - 369
Reçu: 02 mai 2023
Accepté: 04 août 2023
DOI: https://doi.org/10.2478/helm-2023-0035
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© 2023 M. Yu. Tkachenko et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1.

Map illustrating the study area. Red spots = sampling localities: 1 – Lake Svitiaz, 2 – Lake Pisochne, 3 – Lake on Plastova, 4 – Lake on Stryiska.
Map illustrating the study area. Red spots = sampling localities: 1 – Lake Svitiaz, 2 – Lake Pisochne, 3 – Lake on Plastova, 4 – Lake on Stryiska.

Fig. 2.

Gyrodactylus nebulosus ex Ameiurus nebulosus, Lake Svitiaz, Ukraine. A – drawing (upper) and photograph (lower) of opisthaptoral central hook complex; B – drawing (upper) and photograph (lower) of a marginal hook; C – ventral bar; D – dorsal bar (scale bar 10 μm).
Gyrodactylus nebulosus ex Ameiurus nebulosus, Lake Svitiaz, Ukraine. A – drawing (upper) and photograph (lower) of opisthaptoral central hook complex; B – drawing (upper) and photograph (lower) of a marginal hook; C – ventral bar; D – dorsal bar (scale bar 10 μm).

Fig. 3.

Ligictaluridus pricei ex Ameiurus nebulosus, Lake Pisochne, Ukraine. Haptoral and genital hard structures A-E – drawing (left) and photograph (right); A – dorsal hamuli; B – ventral hamuli; of a marginal hook; C – ventral bar; D – dorsal bar; F – male copulatory complex: penis and accessory piece; E – marginal hook (scale bar 10 μm).
Ligictaluridus pricei ex Ameiurus nebulosus, Lake Pisochne, Ukraine. Haptoral and genital hard structures A-E – drawing (left) and photograph (right); A – dorsal hamuli; B – ventral hamuli; of a marginal hook; C – ventral bar; D – dorsal bar; F – male copulatory complex: penis and accessory piece; E – marginal hook (scale bar 10 μm).

Fig. 4.

Ligictaluridus monticellii ex Ameiurus nebulosus, Lake Stryiska, Ukraine. Haptoral and genital hard structures A-E – drawing (left) and photograph (right); A – dorsal hamuli; B – ventral hamuli; of a marginal hook; C – ventral bar; D – dorsal bar; F – male copulatory complex: penis and accessory piece; E – marginal hook (scale bar 10 μm).
Ligictaluridus monticellii ex Ameiurus nebulosus, Lake Stryiska, Ukraine. Haptoral and genital hard structures A-E – drawing (left) and photograph (right); A – dorsal hamuli; B – ventral hamuli; of a marginal hook; C – ventral bar; D – dorsal bar; F – male copulatory complex: penis and accessory piece; E – marginal hook (scale bar 10 μm).

Fig. 5.

Bray-Curtis similarity of brown bullhead (Ameiurus nebulosus) parasite communities from different Ukrainian localities.
Bray-Curtis similarity of brown bullhead (Ameiurus nebulosus) parasite communities from different Ukrainian localities.

Number and size (mean ± standard deviation, minimum and maximum in parentheses) of brown bullhead (Ameiurus nebulosus) examined from different Ukrainian localities

Parameters Lake Svitiaz Lake Pisochne Lake on Plastova Lake on Stryiska
Number 20 10 20 52
Standard length (mm) 128.6±9.7 (112–150) 138.2±23.8 (95–176) 73.9±9.7 (55–95) 61.5±7.8 (43–80)
Total length (mm) 153.6±10.8 (131–177) 157.2±31.6 (109–199) 90.8±9.9 (78–115) 75.3±9.1 (56–95)

Parasites of invasive brown bullhead (Ameiurus nebulosus) from different Ukrainian localities.

Parasite species (site) Index Lake Svitiaz Lake Pisochne Lake on Plastova Lake on Stryiska
CILIOPHORA
Trichodina spp. (gills) P, % 15.0 3.8
MI±sd 4.0±5.2 14.5±14.8
IR 1–10 4–25
A 0.6 0.6
CNIDARIA
Myxozoa gen. sp. (gall bladder) P, % 5.0 10.0
MI±sd 1.0 1.0
IR 1 1
A 0.1 0.1
MONOGENEA
Gyrodactylus nebulosus (fins) P, % 10.0 10.0 9.6
MI±sd 1.5±0.7 1.0 1.6±1.3
IR 1–2 1 1–4
A 0.2 0.1 0.2
Ligictaluridus pricei (gills) P, % 45.0 80.0 60.0 82.7
MI±sd 7.0±4.1 11.5±4.9 10±13.7 8.4±6.8
IR 2–16 5–19 1–46 1–30
A 3.2 9.2 5.95 6.9
Ligictaluridus monticellii (nasal cavity) P, % 25.0 10.0 73.1
MI±sd 2.6±1.5 7.0 4.1±4.1
IR 1–5 7 1–16
A 0.7 0.7 3.0
Ligictaluridae larvae (fins) P, % 3.8
MI±sd 1.0±0.0
IR 1
A 0.04
CESTODA
Paradilepis scolecina (heart, kidney) P, % 10.0 1.9
MI±sd 1.0±0.0 1.0
IR 1 1
A 0.1 0.02
DIGENEA
Diplostomum spp. met (eyes) P, % 85.0 5 51.9
MI±sd 21.6±11.1 2.0 4.2±3.9
IR 6–43 2 1–16
A 18.4 0.1 2.2
Hysteromorpha triloba met (muscles) P, % 45.0 20.0
MI±sd 2.6±1.0 4.0±0.0
IR 1–4 4
A 1.2 0.8
NEMATODA
Anguillicola crassus L3 (mesentery, liver) P, % 70.0 80.0
MI±sd 7.0±6.2 3.9±2.2
IR 1–22 1–8
A 4.9 3.1
Goezia ascaroides (gut) P, % 10.0
MI±sd 3.5±3.5
IR 1–6
A 0.4
Streptocara crassicauda L3 (mesentery, liver) P, % 30.0
MI±sd 5.7±4.0
IR 1–11
A 1.7
Agamonema sp. (mesentery) P, % 1.9
MI±sd 1.0
IR 1
A 0.02
CRUSTACEA
Argulus foliaceus (gills) P, % 5.0 10.0
MI±sd 1.0 2.0
IR 1 2
A 0.1 0.2
Ergasilus sieboldi (gills) P, % 10.0
MI±sd 1.0±0.0
IR 1
A 0.1
ARACHNIDA
Unionicolidae gen. sp. (gills, gut wall, swim bladder) P, % 20.0 10.0
MI±sd 1.3±0.5 3.0
IR 1–2 3
A 0.3 0.3
Species richness 13 8 3 7
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